110 lines
3.0 KiB
Ruby
Executable File
110 lines
3.0 KiB
Ruby
Executable File
#!/usr/bin/env ruby
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=begin
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Munin Plugin for MSSQL - Buffer cache hit ratio monitoring
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Author: Wilfred Chau <openapp.developer@gmail.com>
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Date: 2011-05-19
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Version: 1.0
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License version 2
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as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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Prerequistes:
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1) /etc/odbc.ini and /etc/freetds.conf
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2) rubygems
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3) ruby-dbi
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Usage:
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1) copy this script to the munin install plugins directory (e.g. /usr/share/munin/plugins)
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2) chmod to allow executable to others
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3) create symbolic link in /etc/munin/plugins
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ln -s /usr/share/munin/plugins/mssql_buffercachehitratio.rb /etc/munin/plugins/mssql_buffercachehitratio.rb
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Parameters:
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autoconf
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config (required)
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Config variables:
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sqluser : mssql user who has view server state privilege
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sqlpass : password for the mssql user
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dsn : datasource name as defined in /etc/odbc.ini
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#%# family=auto
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#%# capabilities=autoconf
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=end
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require 'rubygems'
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require 'dbi'
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sqluser = 'rubyuser'
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sqlpass = 'rubyuser'
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dsn = 'TESTSQL'
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#
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# Queries
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#
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#
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dbh = DBI.connect("DBI:ODBC:#{dsn}", sqluser, sqlpass)
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buffercachehitratio_query = "select (a.cntr_value * 1.0 / b.cntr_value) * 100.0
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from sys.dm_os_performance_counters a
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join (select cntr_value, object_name
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from sys.dm_os_performance_counters
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where counter_name = 'Buffer cache hit ratio base'
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and object_name = 'SQLServer:Buffer Manager') b
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on a.object_name = b.object_name
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where a.counter_name = 'Buffer cache hit ratio'
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and a.object_name = 'SQLServer:Buffer Manager'"
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#
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# autoconf
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#
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case ARGV[0]
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when 'autoconf'
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if all_instance_names.length > 1 && sqluser.length > 1 && sqlpass.length > 1
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puts 'yes'
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else
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puts 'no'
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puts "Usage: #{__FILE__} autoconf|conf"
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end
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exit 0
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#
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# config definition
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#
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when 'config'
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puts 'graph_args --base 1000 -r --lower-limit 0'
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puts 'graph_title MSSQL Buffer Cache Hit Ratio '
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puts 'graph_category db'
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puts 'graph_info This graph shows Buffer Cache Hit Ratio'
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puts 'graph_vlabel %'
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puts 'graph_scale no'
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puts 'graph_period second'
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puts 'bc_hitratio.label BufferCacheHitRatio'
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puts 'bc_hitratio.info BufferCacheHitRatio'
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puts 'bc_hitratio.type GAUGE'
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puts 'bc_hitratio.draw LINE1'
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exit 0
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end
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sth = dbh.execute(buffercachehitratio_query)
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sth.fetch do |row|
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puts "bc_hitratio.value #{row[0].strip}"
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end
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sth.finish
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dbh.disconnect
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